Eighty men with urodynamically proven BPO underwent HoLEP at our hospital. All patients were evaluated preoperatively with International Prostate Symptom Score (IPSS), International Continence Society male questionnaire short form (ICS-SF), 3-day frequency - volume charts (FVC), transrectal ultrasonography, and uroflowmetry with postvoid residual urine volume. The patients were divided into two groups; BPO without DO (Non-DO group) and BPO with DO (DO group). We assessed the patients postoperatively at 2 weeks, 1, 3 and 6 months after surgery.